12 results
Industry
PROJECT NUMBER • 2016-200.40
PROJECT STATUS:
COMPLETED

Growing a profitable, innovative, collaborative Australian Yellowtail Kingfish aquaculture industry: bringing ‘white’ fish to the market. WA Component

This set of experiments compared the growth performance, survival and health of yellowtail kingfish (YTK) sourced from two different hatcheries (Strain 1 and Strain 2) fed on various diets over a commercially relevant time period of 56 weeks (ca. 13 months). Fish health was assessed routinely...
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) Fremantle
TAGS
Stakeholder
Nutrition
Husbandry
Economic
Aquaculture
SPECIES
Yellowtail Kingfish
Industry
PROJECT NUMBER • 2016-117
PROJECT STATUS:
COMPLETED

NEAO: addressing current health issues confronting warm water culture of yellowtail kingfish

This project addressed a number of key issues associated with the culture of yellowtail kingfish (Seriola lalandi, YTK) in warm water, including optimising the use of hydrogen peroxide (which is more toxic in warm water), investigating alternatives to the management of monogenean flukes...
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) Fremantle
SPECIES
Yellowtail Kingfish
Industry
Industry

SCRC: Seafood CRC Research Travel Grant: Learning the practical aspects of using of clay particles to improve bacterial management during larval culture, University of Miami, Experimental Marine Hatchery

Project number: 2012-720
Project Status:
Completed
Budget expenditure: $0.00
Principal Investigator: Robert Michael
Organisation: Department of Primary Industries and Regional Development (DPIRD) Fremantle
Project start/end date: 27 Mar 2012 - 30 Aug 2012
Contact:
FRDC
TAGS
Fisheries Management
Disease
Compliance
Aquaculture
Animal Health

Final report

ISBN: 978-0-9756045-2-6
Author: Robert Michael
Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

Final Report • 2012-03-30 • 777.45 KB
2012-720-DLD.pdf

Summary

High incidences of malformation and low level survival are common during Yellowtail Kingfish larviculture and it has been hypothesised that this is a result of excessive harmful bacterial loads within the culture tanks. The current rate of malformation and survival continues to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations and increase the overall survival rate to reduce the cost of juvenile production and improve the quality and quantity of fish being put to sea.

The researcher Dr Michael, travelled to the University of Miami’s Experimental Marine Hatchery (UMEH) to work and train under the supervision of Professor Daniel Benetti and alongside his Masters student, Mr Zack Daugherty, the subject of whose thesis is the use of clay particles in larval rearing of Cobia. Over the past 12 months Mr Daugherty has been conducting preliminary trials on the best methods of handling and delivering clay particles to larval rearing tanks.

During the 30 day visit, Dr Michael was able to further develop these techniques with Mr Daugherty prior to conducting a 13 day replicated research trial that assessed the potential bacterial reducing properties of using clay during Cobia larval rearing compared with the standard green water method that uses concentrated nannochloropsis paste. Using clay particles to replace nannochloropsis paste during the green water phase of Cobia larval culture was recently investigated. The results clearly showed that using this media has the potential to greatly reduce bacterial loads within larval tanks and reduce costs associated with purchasing algal paste concentrates.

SCRC: Development of Yellowtail Kingfish aquaculture in Western Australia: Removal of barriers to profitable production.

Project number: 2011-754
Project Status:
Completed
Budget expenditure: $0.00
Principal Investigator: Gavin J. Partridge
Organisation: Department of Primary Industries and Regional Development (DPIRD) Fremantle
Project start/end date: 2 Nov 2011 - 30 Jan 2014
Contact:
FRDC
TAGS
Physiology
Disease
Diagnostic
Biotechnology
Animal Health

Need

If the Midwest is to achieve its potential of 40,000 tonnes of annual finfish production in the longer term it initially needs incremental development. At the moment it is surrounded by large risks. In order to progress, some of these risks need to be fully identified and then removed, reduced, managed or mitigated. This project is needed to address the removal of those barriers to commercial development that have been identified during the current MFA project (eg parasites) and optimising some key inputs (larval and genetics) to production to improve the commercial viability of a larger scale industry

There is a need for a genetic management strategy to ensure that the captive broodstock comprise a genetically diverse population in order to avoid inbreeding and to provide good opportunities for future genetic selection. There is also the need to more fully understand what genetic variation exists in wild yellowtail kingfish from within WA to both ensure that broodstock populations are representative of this diversity and to make management decisions regarding integration into national breeding programs.

High incidences of malformations continue to impact heavily on the price of juvenile kingfish. There is a need therefore, to reduce the incidence of such malformations to reduce the cost of juvenile production and improve the quality of fish being put to sea.

Sea-caged yellowtail kingfish in Western Australia have a high prevalence of the myxozoan parasite Unicapsula seriolae. It has been recorded in the Jurien Bay fish in 2008/9 and has been monitored closely from development in the current MFA yellowtail kingfish project. This parasite results in myoliquefaction in the same species of fish in Queensland. Its impact on a potential yellowtail kingfish commercial aquaculture industry in WA needs to be assessed and management practices developed and implemented to reduce its impact.

Final report

ISBN: 978-0-9871696-0-0
Authors: Gavin Partridge Lindsey Woolley & Nicholas Robinson
Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Final Report • 2014-04-01 • 2.38 MB
2011-754-DLD.pdf

Summary

Sub-Project 1: Genetics

DNA analyses were used to develop a mating strategy to avoid inbreeding among the limited number of existing captive broodstock in WA. A genetic management workshop was carried out in with ACAAR and WA Industry and used to inform attendees about basic genetic management principles and to collect information relevant to the formulation of the strategy. A genetic management database for tracking fish, collection of water quality data, recording treatments, pedigrees, relatedness and fish traits was developed and tested. The same database has been further enhanced and rolled out to ACAAR and two barramundi hatcheries (Project 2009/730) offering a simple but effective genetic management tool for both of these species.

Sub-Project 2: Larviculture

Our study comparing different rotifer feeding strategies demonstrated that up to 65% fewer rotifers can be used in the production of juvenile YTK than are currently being used in commercial hatcheries, without any negative impact on growth or survival. This is the result of efficient prey capture at low prey densities, even from a young age. This reduction in rotifer usage translates directly to the same percentage reduction in rotifer operating costs. We were unable to determine whether these different strategies had an effect on larval malformation rates, due to the small size of the larvae at the end of the rotifer feeding phase. The results of this research are now being implemented at ACAAR and a manuscript describing this research has been submitted to the ISI Journal, Aquaculture Research. Detailed biochemical composition analyses were performed on rotifers and Artemia enriched on various diets and a blend of diets used in the commercial hatchery production of cobia. These analyses revealed some significant differences in certain aspects of the nutritional composition of both live feed types.

Industry
PROJECT NUMBER • 2005-213
PROJECT STATUS:
COMPLETED

New technologies for sustainable commercial finfish culture

We have demonstrated that yields of 10 tonnes of fish per hectare cannot be sustainably achieved in static, autotrophic saline (14 ppt) ponds (i.e. ponds dominated by photosynthetic organisms) over a 3-4 month production cycle, despite the removal of settable wastes from the SIFTS. The outcome of...
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) Fremantle
TAGS
Sustainability
Innovation
Fisheries Management
Aquaculture
Adoption
Environment
PROJECT NUMBER • 2000-180
PROJECT STATUS:
COMPLETED

Restocking of the Blackwood River Estuary with black bream (Acanthopagrus butcheri)

The results of this study show that hatchery-reared Black Bream can be used to enhance the stock of the population of this commercially and recreationally important species in the Blackwood River Estuary in which it has become depleted. An initial trial of different stains demonstrated that alizarin...
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) Fremantle
TAGS
Restocking
Habitat
Fisheries Management
Estuarine
Data
SPECIES
Black Bream
Industry
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